Rear End Upgrade - BW 9 bolt 2.77 not cutting it
08-25-2010, 08:05 PM
#1
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Car: 89 IROC-Z
Engine: 383 stroker
Transmission: WC T-5
Axle/Gears: 2.77
Rear End Upgrade - BW 9 bolt 2.77 not cutting it
I want to change my rear end but dont want to spend a huge amount of cash. This is just a fun street car, no racing in the plans. (383 w/mini ram, WC T-5)
I currently have a BW 9 bolt with 2.77 posi. Pretty sure that means it has a 2-series carrier so a straight gear swap would require a new carrier.
The best deal I've found so far is just buying another used 9 bolt posi from Hawks with 3.73's. Anyone have a better route to go or have any good ideas?
I currently have a BW 9 bolt with 2.77 posi. Pretty sure that means it has a 2-series carrier so a straight gear swap would require a new carrier.
The best deal I've found so far is just buying another used 9 bolt posi from Hawks with 3.73's. Anyone have a better route to go or have any good ideas?
08-25-2010, 08:41 PM
#2
Re: Rear End Upgrade - BW 9 bolt 2.77 not cutting it
Check with salvage yards. If you do find a good used one with a 3.27 or 3.42 make sure the axles are straight, no bent hubs. Also try to check the posi. Don't want a one wheel peel or the cones worn out. And by the way you do have a 2 series carrier. A 3.08 or larger are the 3 series carrier. Good luck! One more bit of info, The 9 bolt is a 3.70 gear not a 3.73.
Last edited by red rock; 08-26-2010 at 07:56 PM.
08-27-2010, 05:21 PM
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Car: 86 Camaro
Engine: 305
Transmission: 700r4
Axle/Gears: 3.73
08-28-2010, 01:24 AM
#4
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Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Re: Rear End Upgrade - BW 9 bolt 2.77 not cutting it
I recently bought a 3.27s BW 9 bolt with good posi for $215 locally. With new sway bar links and bushings and maybe lower control arm bolts, its gonna be under $250.
Check your local craigs for good deals like I did.
Check your local craigs for good deals like I did.
09-13-2010, 12:48 PM
#5
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Car: 89Z28 Vert
Engine: 350/tbi
Transmission: 700r4
Axle/Gears: 3.27 Posi
Re: Rear End Upgrade - BW 9 bolt 2.77 not cutting it
yes check locally i actually had someone trade me straight up for my 2.73 drum but he is restoring his car to original, but i love my new gearing and disc brake
09-13-2010, 01:38 PM
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Car: 87IROC, 740iBMW, 328iBMW, 86GMC
Engine: 5.7, 4.4LV8, 2.8, 6.0
Transmission: Manuals & Auto's
Axle/Gears: 3.27, 3.42
Re: Rear End Upgrade - BW 9 bolt 2.77 not cutting it
You dont have to stick with the 9 bolt. Odds are you can find a good used 10 bolt with a set of 3.23's or 3.42's if you hunt the wrecking yards or classifieds. Might involve or include a new disk adapter plate from flynbye if you have disks now but, you have other rear end swap options. All of which will cost you something...
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